If you are thinking of attending the U.S. National Genealogical Society's annual conference in Chicago on June 7 through 10, I'd suggest that you get your registration in now. Any procrastination will cost you an extra $35.00.
The deadline for the Early-Bird discounted registration is this Friday: April 21, 2006. On that day, registration prices jump from $175 to $210 for NGS members, from $210 to $245 for non-members.
Details may be found at http://www.ngsgenealogy.org/2006Chicago.cfm.